Project Scope
Saipem has developed its own floating offshore wind concept named Hexafloat, which is a pendulum concept with a submerged counterweight hung to the floating foundation of the turbine. Aim of the counterweight is to bring down Center of Gravity of the structure in order to achieve the required stability in harsh environmental conditions.
For the ultimate scope of work it is considered that for the installation, maintenance and decommissioning, the base case scenario is to fill and recover the ballast material into and from the steel basket while it is hung below the floater at a water depth ranging between 40 – 150m. In addition to this, alternate cases where basket is filled / emptied while floating at the surface or resting on the sea bottom are also to be considered. As a first step towards the ultimate scope, GBC is asked to prepare a budget for inshore ballast installation of the counterweight at the quay site of a shipyard, whilst floating at the surface.
What are the best available raw materials, comparing price, quality and availability? What is the most cost efficient type of installation, dry bulk conveying or pumping? What equipment should be selected for this kind of installation?
Conditions
Raw materials delivered at project site. Infinite availability of space and accessibility at shipyard’s premises. Operators and equipment are local available for rent, thus presenting investment based on local market prices.
Milestones
- Selection and presentation of 6 suitable raw materials, with a dry bulk density range 2,100 – 3,100 kg/m3 (131.11 – 193,53 lb/ft3)
- Selection of suitable equipment for both dry bulk handling with conveyer system, as well as slurry preparation and pumping
